Switch socket



Jul 12', 1927.

R. B. BENJAMIN SWITCH SOCKET Filed March .1. 1922 1,6 ,1 July 12,1927. R a BENJAMIN 35 SWITCH SOCKET Filed March 1. 1922 SSheeta-Sheet' 2 July 12, 1927. 1,635,170

R. B. BENJAMIN SWITCH SOCKET Patented July 12,1927.

, 1,635,170 UNI ED STATES PATENT OFFICE.

.RE UBEN B. BENJAMIN, OF CHICAGO, ILLINOIS, ASSIGNOR TO BENJAMIN ELECTRIC 'MANUIACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION 01' ILLI- swxron sooxnr.

Application filed March 1, 1922. Serial No. 540,195.

My invention relates to switch sockets, and more specifically to switch sockets of the push-bar type.

One of the objects of my invention is to I provide an improved push-bar switch socket which can be readily assembled and disassembled.

A further object of my invention is to provide a unit shell push-bar switch socket in which the interior construction is held in place in the unit shell casing by means of the push-bar.

A further object of my invention is to provide a switch socket which will be durable and efiicient in use, simple in construction, and cheap to manufacture.

A further object of 'my invention is to improve certain features of switch construction. 1

Further objects will appear from the detailed description to follow and from the appended claims.

In the drawings in which an embodiment of my invention is shown- 1 Figure 1 is a side elevation of a push-bar switch socket;

Fig. 2 is a part sectional, part elevational view of the interior construction, removed from the unit shell casing;

Fig. 3 is a bottom plan view of the socket;

- Fig. 4 is a top plan view of the interior :onstruction;

Fig. 5 is a section on the line 55 of Fig. 4, but showing the parts in the casing; Fig. 6 is a sectional view similar to Fig.

5 but showing the switch in a different position;

' Fig. 7 is a section on the line 7 -7 of Fig. 6;

Fig. 8 is a section on the line 8-8 of Fig 5; v ig. 9 is a section on the line 99 of Fig. 6; and I ig. 10 is an unassembled .view ofparts 46 of the switch.

. Referring now to the drawings in detail, the construction shown therein comprises an insulating base 10 on which the switch mechanism 11, receptacle contacts 12 and 13,.

and wiring terminals 14 and 15 are mounted, a unit shell sheet metal casing 16 for housing the insulating base 10 and the parts supported thereby, and a transversely extending bar 17 which serves the'double purpose of operating the switch mechanism 11 and holding the insulating base 10 with the parts supported thereby in the' unit shell casing 16.

The entire interior construction, including theinsulating base 10. the switch mechanism, contacts, and wiring terminals supported thereby. can be removed from the unit shell casing 16 through the open outer end thereof simply by loosening up the center contact screw 13 slightly. sufficiently to permit the transversely extending bar 17 to be drawn out laterally, permitting the entire interior construction to be slipped out through the open end of the casing. The unit shell casing 16 is provided with oppositely disposed lateral openings 18 and 19,

through which the ends of the transversely extending push-bar extend. be engaged for the operation of the switch mechanism. The opening 19 is made large enough so that the push-bar 17 can be withdrawn through this opening, when the cenin position to ter contact screw 13 'is screwed out sufii-' cient-ly to permit such withdrawal. This center contact screw also serves to limit the to and fro movement of the push-bar, by the engagement of the shoulders 20 and 21 on the push-bar with the shank of the screw. The push-bar is recessed as indicated at 22 to permit the necessary to and fro movement for operating the switch mechanism. The push-bar 17 may be an insulating sheet fibre. stamping, guided in slots or notches 23 and 24, in the in ulating base 10, and held in place in these notches by means of the fibre disc 25, which holds the threaded shell contact, 12 in place.

The switch mechanism 11 comprises a sheet metal stamping 26. (Fig. 10 having a pair of switch blades or arms 27 and a slide or shoe portion 28, and a coil compression spring 29 which holds the slide portion 28 of the stamping against the upper edge of the push-bar 17, as shown in Figs. 5 and 6. The push-bar 17 is provided with a cam portion for engagement with the slide portion 28, this cam portion comprising two oppositely inclined portions 30 and 31- meeting at a crest 32. As the push-bar 17 is operated, the slide portion 28 rides up one side of the cam and down the other. As the crest 32passes the point of application of pressure of the spring 29,- the slide 28 is given a quick oscillation The spring 29 is seated in a recess in the snap down into enga means of a screw 17- out'through the openin wardly through ciently insulating base 10, and. is provided with a transversely extending bearing member" 33, which is seated in the bearing notches 34 on thestamping 26. This transversely extendingportion 33 also serves to guide the lower end of the spring, as it extends into oppositely disposed gui e slots 35 in the 1nsulating base 10.

The switch blade 27 controls the circuit between thewiring terminal 15 and the center contact 13 For this purpose, a air of contact members 36 and 37 are provi ed, the contact 36 being electrically connected the center contact 13, and the contact 37 being electrically connected with the wiring terminal 15. The contact 37 is formed as part. of a sheet metal stamping, held in place by means of the screw 38, which extends upthe insulating base 10, and is threaded into the binding plate of the wiring terminal 15. This screw 38 thus also serves to electrically connect the contact 37 with the wiring terminal 15. The contact 36 is formed as,

I v at of a. sheet metal stamping 39 (Fi 3) aving a central portion into which t e-center contact screw 13 is threaded, and having ogpositely disposed outwardly bent ears 40 w ich are bent over the fibre disc 25 to. positionfthe stamping and hold it in place. The stampings of which the contacts 36 and 37 are a part are insulated from each other and from the shell contact 12 by means of the insulatin fibre disc 25..

When the contact b ades 27 of the switch gement with the contacts 36 and 37, the circuit is completed between these contacts 36 and 37 as the switch blades 27 are formed as part of a single sheet metal stam ing. When the contact blades 27 sna out rom betweenth'ese contacts 36 and 3 the circuit is broken.'

The threaded shell contact '12 is electrical- 1y connected with the wiring terminal 14 by 41. The screw 41 to ether with the screw 42 serves to hold the t readgd shlell contact in place onthe insulating see 0.

do. to take out the interior construction is .to back out the center contact screw 13 audito free it from the notch 22 inthe push-bar 17, and then to pull the switch bar 19. The entire interiorconstruction can t en he slipped out of the unit shellcasing 16 for wiring, repairs, ins tion, etc.

While have shown with 811110 for operation through push-bar. As stated above. all that is necessary to but one form of my in a shell receptacle contact, switch mechamsm, a transversely extending push-bar for operating said swltch mechanism, and a screw for limitin the movement of said push-bar, the hea of said screw being positioned to form a center receptacle contact.

2. A switch socket construction comprising an insulating base, a shell contact and switch mechanism mounted thereon, a casing open at one end for receiving said base, swltch mechanism and contact, a transversely extending push-bar for operating said switch mechanism said casing having an o enin through which said push-bar exten s, an a screw for holding said push-bar in assembled relation with respect to the switch mechanism, the head of sand screw being positioned to serve as a center receptacle-contact. 3. A switch mechanismcomprising a switch blade, a push-bar, an elongated shoe extending longitudinally with respect to said push bar'and a spring, being secured to said shoe to said push-bar tions meeting engaging sa d move therewith,

at a crest, the elon ated shoe cam portion and eing held said switch blade having oppositely'inclined porthereagamst by said spring, whereb as said ush-bar is moved, said shoe will ri e up one incline, oscillate'as the crest passes under neath the point of ap lication of the spring pressure and then use down on the other 7 incline.

4. A" switch socket construction comprising an insulating base, receptacle contacts and switch mechanism mounted on said insulating base, a casing open at one end for receiving said base, switch mechanism and contacts, common means for operating said switch mechanism and holding said base and the parts mounted thereon in said casin said common means comprising a transverse y extending push-bar, said casing 'having an opening throu' h which said push-bar extends, said pus -bar being removable lateral- 1y through said opening, and means accessaid casing for limiting the movement of said receiving said base, switch mechanism, and

contacts, said casing having laterally oppositely disposed openings therein, means, operating said switch mechanismjrcomprismg a transversely extending push-bar extending through said openingsgud remov the open end of y Iso- on said ina casing open at one end for a able through one of said openings, and

means accessible for 0 eration through the open end of said casing forlimiting the movement of said push-bar.

6. A switch socket construction comprising an insulating base, receptacle contacts and switch mechanism mounted on said insulating base, a casing open at one end for receiving said base, switch mechanlsm and contacts, common means for operating said switch mechanism and holding said base and the parts mounted thereon in said casing, said common means comprising a transversely extending push-bar, said casing having an opening through which said push-bar extends, said push-bar being removable laterally throu h said opening, and screw means accessi le for operation through the open end of said caslng for limiting the movement of said ush-bar.

7. A switch soc at construction comprising an insulating base, receptacle contacts andswitch mechanism mounted on said insulating base, a casing open at one end for receiving said base, switch mechanism and. contacts, said casing having lateral oppositely disposed openings therein, and means for holding said base and the parts mounted thereon in. said casing comprising a transversely extending push-bar extending through said openings and removable through one of said openings, and means accessible for operation through the open end ofv said casing for limiting the movement of said push-bar.

l 8. A switch construction comprising an elongated reciprocable push bar, a pan of contacts located on opposite sides of said push bar, and a pair of electrically connected oscillatable switch blades operated by said push bar and movable to a position I gated shoe extending longitudinally withrespect to said push bar on which said. switch plates are mounted, said push bar having inclined portions meeting at a crest to form a cam, said elongated shoe engaging said cam, and a spring for holdin said shoe against said cam whereby as sai push bar is moved, said shoe will ride 'up one incline, oscillate as the crest passes underneath the point ofapplication of the spring pressure and then ride down on the other inclme.

9. A switch .mechanism comprising a switch blade, a push-bar, an elongated shoe extending longitudinall with respect to the push-bar and formed integrally with said switch blade, and a spring, said push-bar having oppositely. inclined portions meeting at a' crest, the elongated shoe engaging said cam portion and ing held there-a ainst by said spring whereby as the pushar is moved said 5 0e will ride up one incline, oscillate as the crest passes underneath the point of application of the s ring pressure and then ride down on the ot er incline.

In witness whereof, I have hereunto subscribed my name.

I REUBEN B. BENJAMIN. 

